Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ff3174e77f9e1f…

MALICIOUS

PDF

55.1 KB Created: 2020-10-28 10:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 9b10e4596cad5479620f6fba00771af0 SHA-1: 388cc91eac367e0d58a5b2c515a7a59f9dd37830 SHA-256: a4ff3174e77f9e1fa07a3fe6c1b8f8b5e28e9f421ba6f268d1acfd58312f28d3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=pueblos+de+puerto+rico+con+h In PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/bokobe.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/bepokorinoxabiv.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/5611588.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009511.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009511.bin)
    • https://cdn.shopify.com/s/files/1/0266/9481/1836/files/74348835768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8888/0836/files/9827967686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9689/4357/files/lixiviacion_en_bateas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8081/0140/files/tenetodekuwobuvebex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5194/8453/files/our_father_chords_bethel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f278e0d-23b2-4c96-b62a-3638dfa8e5ce/stihl_fs_45_trimmers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529cd61d-f650-4da3-bc13-06b285d6f2f3/ejercicios_interactivos_palabras_simples_derivadas_y_compuestas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205cfa4e-36db-4395-9f49-310122d43bb7/schumacher_electric_battery_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7f0ada-d68a-44a9-b36b-fe893d328622/watch_gidget_goes_hawaiian_free_onli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d1b8ed-7102-442b-a9bf-d22388409984/21406351041.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/ikea_catalog_2018_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/bruner_theory_of_instruction.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/curriculum_vitae_examples_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/5473/7829/files/alfred_drum_method_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/gpsc_mains_exam_paper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9766/9791/files/hoa_mai_ting_anh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7107/8045/files/lomobesiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/3989960183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7806/7392/files/ganafod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/100_moral_stories_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3044/5731/files/90276907223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/68990466721.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00009511.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9511 5092 bytes
SHA-256: 7df1f49c03f816499eed6fd55e6b4591f4a74de73ef75c49fd7058dc5e906674
font_01_sfnt_off0000a649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA649 12420 bytes
SHA-256: 0ac0ac01ae734c25b9372e364933dbf0774cd401fddafcc08afa6d4a793738e8